Writer/director Rian Johnson’s [i]Looper,[/i] which opens on September 28, is the latest in a long line of time-travel movies. Here, Johnson talks to Co.Create about continuity, character, and making up the rules of time travel.

Writer/director Rian Johnson’s "Looper," which opens on September 28, is the latest in a long line of time travel movies. Here, Johnson talks to Co.Create about continuity, character, and making up the rules of time travel.